Extreme Networks ExtremeWare Version 7.8 Troubleshooting Manual page 99

Following is sample detailed diagnostic output from this command:
========================================================
Manual Diagnostics Collected @ Thu Jan 29 02:48:29 2004
========================================================
Port Speed
(Mbps) (meters)
----------------------------------------------------------------------------------------------
6:1 1000
6:2 1000
6:3 1000
The following command displays cable diagnostics information in summary format for port 1 on slot 6:
show diagnostics cable ports 6:1
The following is a sample summary diagnostic output from this command:
=========================================================
Manual Diagnostics Collected @ Fri Jan 16 03:41:54 2004
=========================================================
Port Speed
(MB)
----------------------------------------------
6:1 1000
Cable Length Information. The reported cable length information is a function of the physical
makeup of the cable itself, and the accuracy of the technology and calculation methodology used to
estimate cable length.
A cable is made up of one or more pairs of separately insulated conductors or lines. Each conductor
pair is twisted at a different rate to minimize electromagnetic interference (EMI). This difference in twist
rates results in a difference in the actual length of each conductor pair: a 100-meter CAT5 cable—for
example—might contain a twisted pair whose actual length might be as long as 103 meters, while
another might have an actual length as short as 99 meters.
Estimating cable length is usually based on a default value for the speed of wave propagation in a
cable, and any error in this default value translates directly into an error in the estimation of cable
Advanced System Diagnostics and Troubleshooting Guide
Avg Len Pair Fault Loc
(meters)
10 1-2 No Fault
3-6 No Fault
4-5 No Fault
7-8 No Fault
5 1-2 6
3-6 6
4-5 6
7-8 5
6 1-2 0
3-6 0
4-5 0
7-8 0
Pair Cable Diagnostic-Mode
Status
1-2 Ok Manual
3-6 Ok
4-5 Ok
7-8 Ok
Skew Polarity Cable
(ns) Status
8 ns Unknown Ok
0 ns Unknown Ok
8 ns Unknown Ok
8 ns Unknown Ok
Unknown Positive Open
Unknown Negative Open
Unknown Positive Open
Unknown Positive Open
Unknown Unknown Imp-Err Unknown
Unknown Unknown Open
Unknown Unknown Open
Unknown Unknown Open
Cable Diagnostics
Pair-Swap Diagnostic
Chan-AB Chan-CD Mode
No-Swap Unknown Manual
Swap Unknown Manual
Unknown Manual
99